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John Deere 420 Tractor Review & Specification

John Deere 420 is an all-around tractor suitable for all your garden work. This model from John Deere 400 was launched in  1956 and 55000 tractors were manufactured before its discontinuation in 1958.

The high demand for the John Deere 420 model resulted in the rebirth of this tractor after 25 years in 1983. And this time it was in production for 8 years from 1983 to1991. The reborn version came to the market with many modifications in its features. This made the John Deere 420 model a favorite tractor of all time.

This utility tractor is available in several configurations including standard, utility, crawler, general-purpose, hi-crop, and special. All the different versions have unique wheel configurations.

The John Deere 420 model comes with a 20HP Onan 2-cylinder gas engine and 2WD hydrostatic Sundstrand 90 transmission. It is a popular garden tractor and many owners claim it to be the best garden tractor ever built. This big tractor weighs 899 lbs. If you want to know more about the John Deere 420 tractor, read its specifications, features, price, etc. in this article.

John Deere 420 Tractor Review

Specifications of John Deere 420 Tractor

ModelJohn Deere 420
Weight3,250 pounds
Length114.75 inches
Width55.5 inches
Height58.75 inches
Wheelbase52 inches
EngineOnan B48G / Onan P220G
Fuel typeGasoline/All-fuel/LP
No. of Cylinders2
Power21 kW
Power (Drawbar)20.31 HP
Power (Belt)24.83 HP
Governed RPM1850 rpm
Displacement113 ci
Coolant capacity11 qts
Fuel capacity6.5 gal 24.6 L
Bore/Stroke4.25 in 4.00 in
Cooling systemWater
Transmission Typehydrostatic Sundstrand
Gears4 forward and 1 reverse
BrakesShoe and drum (Rear wheels)
PTO 3-PointCategory-I
TypeTransmission (live optional on 5-speed)
Speeds540 RPM
Ag front5.00-15
Ag rear9-24
Rear PTOIndependent
Rear RPM2000
Front PTOIndependent
Front RPM3400
Battery12V BCI Group 22F
Cabin TypeOpen operator station
Attachments50" mid-mount mower deck 60" mid-mount mower deck snow blower blade front-end loader

Features Of John Deere 420 Tractor

John Deere 420 is a popular utility tractor developed by Deere & Company in 1956. This powerful 2WD tractor was reborn in 1983. Here are the key features of the John Deere 420 model tractor.


After its rebirth in 1993, John Deere 420 model came equipped with an Onan B48G engine of 20 horsepower capacity. This 2-cylinder air-cooled gasoline engine has a displacement of 781 ccs and its bore stroke is 3.25×2.875 inches. The 12 volts engine has rated  RPM 3500  and its idle RPM is between 100-3450.

This engine was replaced in 1987 by the Onan P220G with a higher RPM rating of 3600.


This tractor uses Sundstrand 90 shaft-driven hydrostatic transmission system. The hydrostatic powered steering enables you to control the vehicle with ease. Its rear wheels are connected to the shoe and drum braking system. The tractor provides a forward speed of up to 12.4 km and a reverse speed of 6.2 km. It has a 4×2 2WD chassis with a transmission oil capacity of 7.1 L.


PTO enables the transmission of power from the engine to different attachments in a tractor. So your tractor cannot work properly without the right power take-off shaft.

In the John Deere 420 tractor, both front and rear PTOs are independent with an electric clutch. The front PTO speed is 3450 RPM while its rear PTO speed is 2000 RPM.


John Deere 420 tractor includes useful attachments supported by its 3 point hitch (front, mid and back hitches). The prime attachments are 50″ mid-mount mower deck, 60″ mid-mount mower deck, blade, tiller, front-end loader, and snowblower.

Pros Of John Deere 420 Tractor

  • Its powerful 20 horsepower engine makes the tractor faster and enables you to work more in less time.
  • You can complete all your garden work seamlessly with this all-purpose tractor.
  • John Deere 420 offers a hydrostatic transmission system that enables power steering for easy movement.
  • The 2WD tractor has a reserve tank that allows 30 minutes of additional work time after the tractor is out of fuel.
  • The gearbox system of the tractor has 4 forward and 1 reverse speed.

Cons Of John Deere 420 Tractor

  • Hand drive control of this tractor is difficult compared to a foot control system in other tractors.
  • It is a massive tractor and tough to navigate in tight spaces.

Price Of John Deere 420 Tractor

The Original Price of a 1956 manufactured John Deere 420 tractor was USD 3200. And a 1983 manufactured tractor price was USD 7000. The price of a used tractor is around USD 7000 and the accurate price depends on its condition and location.

Manufacturing Year

The John Deere Tractor Company provides serial numbers to its models. This tells you the year and the month of production. You can find the manufacturing year from the table below.

1983  M00420X222001

1984  M00420X285001

1985  M00420X315001

1986  M00420X360001

1987  M00420X420001

1988  M00420X475001

1989  M00420X595001

1990  M00420X010001

1991  M00420X100001


John Deere 420 Tractor

John Deere 420 is a powerful 2WD utility tractor with a 20HP engine. It offers great features and useful attachments. This article includes all kinds of information about this model. Hopefully, the post will be helpful for you to know more about the John Deere 420 tractor model.

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